Question: From a random sample of six students in an introductory finance class that uses group-learning techniques, the mean examination score was found to be 76.12 and the sample standard deviation was 2.53. For an independent random sample of six students in another introductory finance class that does not use group learning techniques, the sample mean and standard deviation were 74.61 and 2.21 respectively. State all the assumptions needed to find an 90% confidence interval for the difference between the population means. Is it possible to say at this level that group learning is useful in Introductory Finance classes?